What Unix are you exactly using: Solaris, HP-UX, AIX, *BSD? Also what does it mean "doesn't work": the -a option isn't recognized and man doesn't show anything or man shows only the first page? One more thing: could you give examples of <xyz> just to be sure that there are multiple sections on that subject?
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Cristian CiupituSep 1 '10 at 2:26

@cristian: I just updated my original question.
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HemantSep 10 '10 at 11:22

Not necessarily (the Unix in question is HP-UX). Haven't used HP-UX since the late 90s so I don't have one handy, but GNU-based tools like info(1) aren't globally available unless we're talking about Linux. They certainly weren't available on SunOS and Solaris, and still aren't. You have to install the GNU tools separately, often by compiling them.
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AlexiosJan 24 '12 at 1:42